Subsequent Event (Details) - HCR Agreement $ in Thousands	Nov. 01, 2023 USD ($) agreement
Subsequent Event [Line Items]
Upfront payment receivable, net of certain expenses	$ 17,500
Subsequent Event [Member]
Subsequent Event [Line Items]
Maximum consideration for royalties sold or agreed to sell	40,000
Potential sales-based milestone payments	2,500
Subsequent Event [Member] | If, prior to December 31, 2023, pricing for Kapruvia (difelikefalin) in Germany is approved above a certain threshold amount per dose
Subsequent Event [Line Items]
Upfront payment receivable, net of certain expenses	$ 20,000
Subsequent Event [Member] | If the 2029 Threshold is achieved on or prior to December 31, 2029
Subsequent Event [Line Items]
Collaboration And Licensing Agreement, Threshold Number Of Times Of Aggregate Payments Made By Counterparty, Considered For Termination Of Agreement | agreement	2
Subsequent Event [Member] | If the 2029 Threshold is not achieved on or prior to December 31, 2029
Subsequent Event [Line Items]
Collaboration And Licensing Agreement, Threshold Number Of Times Of Aggregate Payments Made By Counterparty, Considered For Termination Of Agreement | agreement	2.8